Within 48 hours of the tragic blast at the Alfred P. Murrah Building on April 19, 1995, federal officials were blanketing the news media with their theory of the crime and with the designated "patsies" already judged "guilty."
According to the federal theory, to which the news media subscribed without question, the bombing was the work of American dissidents bent on a violent overthrow of the government. Congress responded by immediately enacting legislation to give the government unprecedented latitude with the invasion of individual privacy.
All evidence actually points to a well planned, sophisticated government operation put into motion months earlier, with a massive cover-up controlled by the U. S. Justice Department, and carried through and beyond the "Star Chamber" charade of trials in Denver in 1997. (Source)